Lg Display Co., Ltd.

Jin Huh

Yong Min Ha

Chang Hwan Lee

Chang-Hoon Jeon

Jung-Chul Kim

Jung Chul Kim

An organic electro-luminescence device includes a drive unit having first to fourth transistors and a capacitor, and an organic light emitting diode (OLED) controlled by the drive unit, wherein the first transistor has its gate, drain and source connected to a first node, a second node and a power voltage supply line, respectively; the second transistor has its drain and source connected to the OLED and the second node, respectively; the third transistor has its gate, drain and source connected to a first select signal line, the second node and the first node, respectively; the fourth transistor has its gate, drain and source connected to the first select signal line, a data line, and the second node, respectively; and the capacitor is connected to the first node and a predetermined signal line.

Organic electro-luminescence device and method of driving the same

A method of driving an organic electroluminescent display device, including measuring a gray level of an image, turning on a sampling transistor connected to gate electrode and drain electrode of a driving transistor during a sampling time, applying a data voltage to operate the driving transistor, and supplying a current to an light emitting diode through the driving transistor.

Organic electroluminescent display device and driving method thereof

A driving circuit of an organic light emitting display includes: a first PMOS transistor turned on in response to a driving signal to transfer a data signal; an OLED (organic light emitting diode) where an amount of light emitted is controlled by a control current; a second PMOS transistor for supplying the control current to the OLED; a third PMOS transistor connected to a node to which the first and second PMOS transistors are connected; a first capacitor connected between the first PMOS transistor and the third PMOS transistor; and a second capacitor connected between the second PMOS transistor and the first PMOS transistor.

Driving current of organic light emitting display and method of driving the same

An organic light emitting diode device includes a substrate having first and second surfaces and a diode on the first surface of the substrate. The diode includes a first electrode, a second electrode facing the first electrode and an organic emitting layer between the first and second electrodes. Light is emitted from the diode toward the first and second surfaces of the substrate. A brightness compensation plate having a thickness that varies across a length of the plate is disposed on the second surface of the substrate for transmitting the light. The brightness compensation plate may improve a uniformity of a brightness of the organic light emitting diode device.

Organic light emitting diode device including brightness compensation plate

An organic light-emitting device and an organic light-emitting display having the same are provided. The organic light-emitting device comprises: an organic light-emitting diode emitting light using an output current; a storage capacitor for receiving a data voltage from a data line, and storing the received data voltage; a driving thin film transistor connected between a source voltage and the organic light-emitting diode and having a gate connected to one terminal of the storage capacitor; a first switching unit connected between the one terminal of the storage capacitor and the data line and having a gate connected with a first scan line; a second switching unit connected between the other terminal of the storage capacitor and an initialization voltage line and having a gate connected with the first scan line; and a third switching unit connected between the other terminal of the storage capacitor and the data line and having a gate connected with a second scan line.

Organic light-emitting device and organic light-emitting display

An organic light emitting display that is capable of preventing degradation of picture quality, and a method of manufacturing the organic light emitting display are provided. A unit pixel for the organic light emitting display, includes a first transistor coupled to a data line and having a first voltage threshold, a second transistor coupled to the first and third transistors and controlled by a second select signal, a third transistor coupled to the first transistor and controlled by a first select signal, and a fourth transistor coupled to the third transistor and having a fourth voltage threshold such that a drive current of the fourth transistor is controlled independent of the fourth voltage threshold.

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Gumi-si, South Korea

Jin Huh